// Populates glTF metadata and scene extras fields.
private void SetExtras(
GlTF_ScriptableExporter exporter, ExportUtils.SceneStatePayload payload)
{
Color skyColorA = payload.env.skyColorA;
Color skyColorB = payload.env.skyColorB;
Vector3 skyGradientDir = payload.env.skyGradientDir;
// Scene-level extras:
exporter.G.extras["TB_EnvironmentGuid"] = payload.env.guid.ToString("D");
exporter.G.extras["TB_Environment"] = payload.env.description;
exporter.G.extras["TB_UseGradient"] = payload.env.useGradient ? "true" : "false";
exporter.G.extras["TB_SkyColorA"] = CommaFormattedFloatRGB(skyColorA);
exporter.G.extras["TB_SkyColorB"] = CommaFormattedFloatRGB(skyColorB);
Matrix4x4 exportFromUnity = AxisConvention.GetFromUnity(payload.axes);
exporter.G.extras["TB_SkyGradientDirection"] = CommaFormattedVector3(
exportFromUnity * skyGradientDir);
exporter.G.extras["TB_FogColor"] = CommaFormattedFloatRGB(payload.env.fogColor);
exporter.G.extras["TB_FogDensity"] = payload.env.fogDensity.ToString();
// TODO: remove when Poly starts using the new color data
exporter.G.extras["TB_SkyColorHorizon"] = CommaFormattedFloatRGB(skyColorA);
exporter.G.extras["TB_SkyColorZenith"] = CommaFormattedFloatRGB(skyColorB);
}
private void WriteObjectsAndConnections(GlTF_ScriptableExporter exporter,
SceneStatePayload payload)
{
foreach (BrushMeshPayload meshPayload in payload.groups.SelectMany(g => g.brushMeshes))
{
exporter.ExportMeshPayload(payload, meshPayload, GetGroupNode(meshPayload.group));
}
foreach (var sameInstance in payload.modelMeshes.GroupBy(m => (m.model, m.modelId)))
{
var modelMeshPayloads = sameInstance.ToList();
if (modelMeshPayloads.Count == 0)
{
continue;
}
// All of these pieces will come from the same Widget and therefore will have
// the same group id, root transform, etc
var first = modelMeshPayloads[0];
GlTF_Node groupNode = GetGroupNode(first.group);
if (exporter.G.Gltf2)
{
// Non-Poly exports get a multi-level structure for meshes: transform node on top,
// all the contents as direct children.
string rootNodeName = $"model_{first.model.GetExportName()}_{first.modelId}";
if (modelMeshPayloads.Count == 1 && first.localXform.isIdentity)
{
// Condense the two levels into one; give the top-level node the same name
// it would have had had it been multi-level.
GlTF_Node newNode = exporter.ExportMeshPayload(payload, first, groupNode);
newNode.PresentationNameOverride = rootNodeName;
}
else
{
GlTF_Node parentNode = GlTF_Node.Create(
exporter.G, rootNodeName,
first.parentXform, groupNode);
foreach (var modelMeshPayload in modelMeshPayloads)
{
exporter.ExportMeshPayload(payload, modelMeshPayload, parentNode,
modelMeshPayload.localXform);
}
}
}
else
{
// The new code's been tested with Poly and works fine, but out of
// an abundance of caution, keep Poly unchanged
foreach (var modelMeshPayload in modelMeshPayloads)
{
exporter.ExportMeshPayload(payload, modelMeshPayload, groupNode);
}
}
}
foreach (ImageQuadPayload meshPayload in payload.imageQuads)
{
exporter.ExportMeshPayload(payload, meshPayload, GetGroupNode(meshPayload.group));
}
foreach (var(xformPayload, i) in payload.referenceThings.WithIndex())
{
string uniqueName = $"empty_{xformPayload.name}_{i}";
var node = GlTF_Node.Create(exporter.G, uniqueName, xformPayload.xform, null);
node.PresentationNameOverride = $"empty_{xformPayload.name}";
}
}
private ExportResults ExportHelper(
SceneStatePayload payload,
string outputFile,
bool binary,
bool doExtras,
int gltfVersion,
bool allowHttpUri)
{
// TODO: Ownership of this temp directory is sloppy.
// Payload and export share the same dir and we assume that the exporter:
// 1. will not write files whose names conflict with payload's
// 2. will clean up the entire directory when done
// This works, as long as the payload isn't used for more than one export (it currently isn't)
using (var exporter = new GlTF_ScriptableExporter(payload.temporaryDirectory, gltfVersion))
{
exporter.AllowHttpUri = allowHttpUri;
try
{
m_exporter = exporter;
exporter.G.binary = binary;
exporter.BeginExport(outputFile);
exporter.SetMetadata(payload.generator, copyright: null);
if (doExtras)
{
SetExtras(exporter, payload);
}
if (payload.env.skyCubemap != null)
{
// Add the skybox texture to the export.
string texturePath = ExportUtils.GetTexturePath(payload.env.skyCubemap);
string textureFilename = Path.GetFileName(texturePath);
exporter.G.extras["TB_EnvironmentSkybox"] =
ExportFileReference.CreateLocal(texturePath, textureFilename);
}
WriteObjectsAndConnections(exporter, payload);
string[] exportedFiles = exporter.EndExport();
return(new ExportResults
{
success = true,
exportedFiles = exportedFiles,
numTris = exporter.NumTris
});
}
catch (InvalidOperationException e)
{
OutputWindowScript.Error("glTF export failed", e.Message);
// TODO: anti-pattern. Let the exception bubble up so caller can log it properly
// Actually, InvalidOperationException is now somewhat expected in experimental, since
// the gltf exporter does not check IExportableMaterial.SupportsDetailedMaterialInfo.
// But we still want the logging for standalone builds.
Debug.LogException(e);
return(new ExportResults {
success = false
});
}
catch (IOException e)
{
OutputWindowScript.Error("glTF export failed", e.Message);
return(new ExportResults {
success = false
});
}
finally
{
payload.Destroy();
// The lifetime of ExportGlTF, GlTF_ScriptableExporter, and GlTF_Globals instances
// is identical. This is solely to be pedantic.
m_exporter = null;
}
}
}
